Radiator



Oct, 11 1927 3,644,685 G. H. L-QBER RADIATOR Filed June 9. 1926 2 Sheets-Sheet:

G. H. LQBER RADIATOR Filed June 9. 1926 2 Sheets-Sheet :2

gwua nto v Patented ct. 11, 1927.

UNITE GEORGE E. Lonnie. or TOLEDO, OHIO, ASSIGNOR TO THE Baez-racer conroearion, or

nernoi r, MICHIGAN, A CORPORATION or MICHIGAN. 1

RADIATOR.

Application filediune 9; 192's. Serial at; 114.706;

7 invention has for its object to form a radiator for automobiles which 1s so constructed that it will not only sufficiently cool 1 the water that is caused to flow by convectionor by pum from the automobile jacket is also so constructed that when the ice melts,

the tubes will be caused to return to their nprinal size so that in subsequent freezing of the water, thetubes maybe again expanded and distend to allow for the'incr'eas'ed 1 volume without tearing of the tubes.

My invention particularly provides an efficient means for permitting the expansion of the tubes and causes their return to their normal size when theirfdi'stension ceases.

The invention may be contained inr'adiators which vary in their details of construction and to illustrate a practical application of the'ihvention, I have selected a radiator constructures and shall describe it hereinafter.

The radiator selected as an illus'tration of such construction is shown in the accompanying drawings, and is described hereinafter.

Figure 1 of the drawing illustrates a radilator of the type to which my invention is applied. Fig. 2 illustrates a part of the radiator. 3 illustrates astri'p having protruding ribs that elastically engage two side walls or two parallel water passage ways, and at the same time forms a heat conducting-means for transferring the heatof the water to the airthat passes through the strip and makes Contact with the strip. F1 g. 4 ill u'str'atesthe form of the separatingstrip at a completion of a step in the process of roducin it. Fig. 5 is a View O f a section of a partner the radiator, the plane or the section extending transversely to the water tubes. Fig. 6 is an edge view of the strip shown on Fig. 3.

As is well known in connection with automobiles, the radiators commonly used are of the type shown in Fig. 1, which have a honey-comb face 1, that are formed by corrugating angularly the edge portion's of the strips that form the water tubes of the radiator and a spacer for spacing the water tubes. The honey-comb face. which is located not only in the front of the radiator,but

also at the rear ofthe radiator aflords a means for rigidly holdingthe water tubes in position and in spaced relation to allow the air to move between the tubes. The tubes are formed usually of pairs of sheet metal strips having their edge portions corrugated and secured together by solder. Soldering of the edges of the tube is usually doneby dipping the corrugated edge portions in solder. The portions of the pairs of strip between the corrugated edges are so shaped that they will normally besubst'antially parallel to eachother and in'spaced relation so 1 as to form a thincolumn or film of water within the tube and give a large contact area for the conduction ofthe heat from the water. The tubes communicate with the chamber that is located at the top 2 of the radiator and also a chamber that is located at the bottom of the radiator. The upper chamber of the radiator connects with the upper portion of the jacket of the engine of the automobile while the lower chamber connects with the lower portion of the jacket. My invention provides a separating strip which is so constructed as to make contact with the air streams through the radiatorand form a large area of contact with the strips that form the tubes of the radiator. and at the same time permit-distension of the tubes and elastically cause the return of the tubes to their normal size when'th'e cause of distension is removed. p

As'shown in Fig. 5, the tubes" re formed of the strips 3 and 4, having corrugated edged portions 5. The corrugated edgeportions' of the strips- 3 and 4' arenested one within. the other and soldered bydipping or otherwise to seal the rear and front edges of the tubesv that-is thus formed. Thejwstrips 3 and 1 are pressed to shape so that when the edges'are thus nested together the body; portions'of the strip will beloc'ated in parallel and spaced relation relative to each other, as shownin the figure: In the form of construction shown in the drawings the strips and 4 are preferably providedwith central beads 6 that extend inward with respect to the tube and so as to maintain the body portions of the strips in their parallel relation notwithstanding exterior pressure that may be brought to bear on the tubes by the separating strip shown in Fig. 3.

J uxtaposed tubes are separated by the strip 7, which has corrugated edged portions 8, and is so placed relative to adjoining tubes that the angles of the corrugations make con-- strips are mechanically secured or bound together and are dippedin solder. The solder then. maintains the parts in their relative positions when in use. I

The strips 7, in the process of their formation are die pressed to form channels as shown in Fig. 4. They are then split crosswise through the central portions thereof and parts between these slits are struck up which results in the formation of a plurality of ribs 9, the adjoining ribs, except at their ends being displaced by a distance substantially equal to twice the depth of the corrugations 8, formed along the edges 'of the strips 7. The central parts of the ribs 9 are provided with beads 10, that operate to stiffen the central parts of the ribs leaving the end portions 11, elastic to elasticallymaintain the ribs in their normal positions. When the strips 7 are in position be 'tween the vertical water tubes, the ribs 9 are placed against the straight vertical wallsof the adjoining water tubes on opposite sides of the beads, 10, which project inward with respect to the ribs of thestrips.

Thus on opposite sides of the beads 10, each rib is,- in the assembly of the strips in forming the radiator, placed in intimate contact with one of the heat conductive walls of a tube- The ribs thus operate normally to press the walls of each tube towards each other and by reason of the elastic portions of the ends of the ribs, elastically hold the tubes in their parallel relation. To produce a limitation of this inward movement of the tubes of the radiator, the beads on the walls of the tubes are held in contact by the presfree flow of water through each tube'and yet form a relatively thin column or film of sure of the ribs, the beads however, maintaining the body portions of the walls of each tube in spaced relation permitting the water within the tube from which the heat may be readily conveyed.

The elastic end portions 11, of the ribs 9, are located in line with angles 13 of the corrugations ofthe edges of the strips 7, and consequently the air as it moves relative to the radiator through the openings formed by the corrugations, strike themetal of the edge portions where the elastic partsll, join the edge portions. The air also directly strikes the end portions 11, with the results that the heat conducted from the walls of the radiator tubes to the ribs is immediately removed by the moving air. Thespacing ribs maintain a relatively large space between the tubes of the radiator which gives opportunity for the air to receive the'heat of the water through the walls of the tubes, the air being moved rearwardly by the inrushing air through the openingsformed in the front of the radiator.

I claim: g I I 1.. In a radiator for an automobile, a plus rality of vertical water tubes formed by pairs of strips of sheet metal located in spaced relation and having corrugating contacting edges, the strips forming the tubes having inwardly extending beads located.

along the vertical central linesof the strips, beads of each tube being normally in contact with each other and adapted to be separated from each other by freezing of the water in the tube, spacing strips located intermediate the tubes and having corrugated edges, the angles in thecorrugations of the spacing strips being in contact with the angles of the corrugations of they tubes to form air passage-ways between the tubes, each spacing strip having a plurality of -alternately projecting ribs struck up between the I corrugated edge portions and pressed against the tubes and extending transversely substantially the width of the tubes, the end portions of the ribs being elastic for elasti cally pressing the sheet metal strips of the tubes towards each other, the beads of the tubes operating to limitthe inward movement of thestrips of the tubes by the pres.-

sure of the ribs when the ice thaws.

2 In a radiator for an automobile, a plurality of vertical water tubes formed by pairs of strips of sheet metal located in spaced relation and having corrugated contacting edges, the strips of sheet metalhaving centralbeads being normally inycontact with each other and adapted to be separated from each other by freezing of the water in the tubes, spacing strips being located intermediate the tubesand having corrugated edges, the angles in the corrugations of the spacing strips being in contact with the angles of the corrugations of the tubes to form air passage-ways bet-ween the tubes, each spac ng strip having a plurality of elastic portions struck up and located transversely 1ncontact with substantially the entire width of the tubes, the end portions of the said struck up portions being formed of elastic sheet metal, while the central portions of the said struck up portions are beaded to increase the rigidity of the central portion, whereby the tubes will be elastically pressed by the elastic ends of the struck up portions located on opposite sides of the tubes to yieldingly resist the expansion when the water freezes and to cause the tube to return to its normal condition when the 10 ice thaws.

In testimony whereof I have hereunto signed my name to this specification.

GEORGE H. LOBER. 

